Chapter 13: A Couple's Quarrel and Murder (13) Find out before dawn...
"How is it?" Sang Luo asked expectantly.
Yuan Xiaohu hesitated and handed the file bag to Sang Luo: "You should read it yourself."
Seeing the expression on Yuan Xiaohu's face, Sang Luo knew that something was wrong. She nervously opened the file bag, took out the test report inside, and read it carefully. The report showed that the DNA remaining in the nails of Shen Xueyao's body was Du Lingfeng's, and the fingerprints on the handle of the fruit knife at the scene were also consistent with Shen Xueyao's.
So, it was Shen Xueyao who fought with Du Lingfeng that night, and it was also Shen Xueyao who killed people with a knife. There was no third person. Sang Luo thought to himself, could it be that I was wrong from the beginning, and there was no injustice in this case at all?
Ma Shi Tu stood behind Sang Luo and saw the report results at a glance. Disappointment also appeared on his face. Yuan Xiaohu said cautiously:
"Um... Master, there is one more thing. When we came back, Captain Liao happened to see the result and he asked you to go to his office."
Ma Shi Tu's face became serious. Without saying a word, he turned around and walked into the office of Captain Liao next door. Sure enough, a deafening roar came from next door soon, and Captain Liao scolded him again:
"You're wasting time and resources investigating a case whose outcome is obvious. Are you dissatisfied with the workload assigned to you? You don't act like a master at all. You let your subordinates do whatever they want. That's not how you solve a case. You're just nitpicking. The truth is clearly out, but you insist on investigating it. You've dragged it out for so long, isn't it because that newbie wants to show off..."
Captain Liao was making an indirect accusation, and Sang Luo understood it. She did not argue, but forced herself to calm down and repeatedly sorted out the case in her mind.
Hearing Captain Liao's scolding, Yuan Xiaohu and Xie Ling'er also looked frustrated. Everyone felt bad. In order to change the subject, Xie Ling'er casually flipped through the notes that Sang Luo had written when he investigated Du Meizhen during the day:
"Tsk, tsk, tsk, this sister actually has this kind of feelings for her brother... She even used needles to prick the villain and put so many needles on the bedside, not afraid of pricking herself. This child is really terrible..."
When Xie Ling'er mentioned the needle, Sang Luo suddenly felt a shock in her head, as if she remembered something. She turned around and picked up the evidence report of the case, and quickly flipped through it. Finally, her hand stopped at a certain page. She repeatedly confirmed the lines of words with her eyes, and then read them out:
"A black trash can was found near the body, which contained socks, vegetable leaves, egg shells, needles, and biscuit packaging bags."
Yuan Xiaohu looked at her strangely: "Why are you suddenly saying this? Are you... stimulated by something?"
"Needle, it's a needle!" Sang Luo emphasized.
Why was there a needle in the trash can? It is very likely that the murderer used the needle to pick out the flesh from his own nails, then stuffed it into the crack of Shen Xueyao's nails, and finally threw the needle away.
"The murderer knew that we would check the DNA in the nails of the female corpse. She had anticipated this step, so she made preparations in advance—" Sang Luo slammed the table and stood up, "This is a murderer with anti-detection awareness!"
"It's too far-fetched. How could the murderer know so much? Ordinary people don't even know what DNA is." Yuan Xiaohu's mouth twitched. "Sang Luo, I advise you to face the reality. The murderer of this case has been Shen Xueyao from the beginning."
Sang Luo did not waver: "It is very simple to confirm my guess. If it is true as I said, then there should be blood on the needle. If I am wrong, there should be nothing on the needle."
"This is easy. All the things are in the bureau. You can tell at a glance!" Yuan Xiaohu waved his hand and led the two of them to the evidence room.
The items in the evidence room were arranged according to numbers, and Yuan Xiaohu easily found the evidence in this case. He took out the needle, carefully lifted the needle through the evidence bag, and looked at it under the light.
Under the light, the three of them could clearly see the black spot on the tip of the needle - it was dried, blackened blood.
"We can do another DNA test. I'm sure this is Du Lingfeng's bloodstain. It was left by the murderer when he used this needle to transfer the residue between his fingernails." Sang Luo said firmly.
Xie Ling'er looked embarrassed: "But... we don't have much time left. Just now when I passed by Captain Liao's office, I heard Captain Liao tell Master that Master must submit a closing report tomorrow morning. The case will be closed tomorrow at the latest."
"Then we will find the real murderer before tomorrow morning!"
For some reason, an inexplicable courage made Sang Luo say this.
Time was running out, and they would definitely have to work overtime all night. Xie Ling'er said without hesitation: "Okay, I'll stay with you!"
They both looked at Yuan Xiaohu. This overtime was not requested by the leader, but proposed by Sang Luo. Sang Luo thought he would refuse, but unexpectedly Yuan Xiaohu blinked and agreed: "I'll stay, too."
"Why? Don't you disagree with my opinion?" Sang Luo couldn't help but ask.
Yuan Xiaohu patted his chest and said, "It doesn't matter if we have different opinions. The most important thing is that we are a team and we must advance and retreat together. If you stay, I will stay. If you need physical strength, I can still help."
"Thanks!"
Sang Luo simply thanked him and started to focus on the case again. She didn't have much time left, so she quickly looked through the evidence. As each item passed her eyes, she suddenly stopped.
She had been having a strange feeling ever since she saw the crime scene, and now she finally understood what was strange.
So clean.
Yuan Xiaohu looked over and found that Sang Luo was holding the murder weapon, the fruit knife. She put the evidence bag in her hand and looked at the handle of the knife over and over again.
"We have gone to the city for inspection today. There are Shen Xueyao's fingerprints on the knife handle. Do you still think there is a problem?" Yuan Xiaohu asked.
Sang Luo nodded: "Don't you think the handle of this knife is too clean?"
After hearing what she said, they both leaned over to take a look. Sang Luo explained, "The clothes Shen Xueyao was wearing when she hanged herself were splattered with blood, and her cuffs were also soaked with blood. We can infer that a lot of blood must have been shed at the scene. After the murderer stabbed her, the victim's blood flowed from the tip of the knife to the handle, and finally flowed to the murderer's cuffs."
Sang Luo simulated this process with clean water. As she said, the handle of the fruit knife should have been covered with blood, but now there was only a small amount of blood left on the handle.
Inspired by this, Xie Ling'er immediately understood what Sang Luo meant: "You mean, the knife handle was wiped by someone after the incident?"
Sang Luo nodded: "I suspect that Shen Xueyao's fingerprints on the handle were deliberately printed by someone."
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